body {
    margin: 0;
    padding: 0;
    background-color: #eeeeee;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
.main_view {
    background-color: white;
    width: 900px;
    border-radius: 20px;
    margin: 20px auto;
    padding: 35px;
    font-size: 15px;
}
.field_view {
    height: 300px;
    overflow-y: scroll;
}

pre{
    margin-top: 0px;
    margin-bottom: -30px;
    padding: 0;
}
pre code{
    display: block;
    margin: 0;
    min-height: 80px;
    max-height: 300px;
    border-radius: 10px;
}